Improvement in log-sleds



UNITED STATES HIRAM S. BARTLETT, OF MIDLAND7 MICHIGAN.

PATENT QEErcEo IMPROVEMENT IN LOG-SLEDS.

Specification forming part of Letters Patent No. l 63,0112, dated May1l, 1875; application iiled March 20, 1875.

To all whom it may concern:

Be it known that I, HIRAM S. BARTLETT, of Midland, in the county ofMidland and State of Michigan, have invented a new and usefulImprovement in Logging-Sled, Smc., of which the following is aspecification:

Figure l is a side View of a logging-sled to which my improvement hasbeen applied, part being broken away to show the construction.l

Fig. 2 is afr detail top View of the saine, part being broken away toshow the construction. Fig. 3 is a detail cross-section of the same,taken through the line a: a', Fig. l.

Similar letters of reference indicate corresponding parts.

The object of this invention is to improve the construction of loggingand other sleds, so as to make them stronger and more durable, andenable them to yield to accommodate themselves to uneven ground.

The invention consists in the saddle constructed and combined with therunner, the beam, and the bolt, as hereinafter fully described.

A represents a runner of the sled, about the construction of which thereis nothing new. B is asaddle or knee, which is grooved upon its lowerside to receive and fit upon the upper edge ofA the runner A, and' issecured in place upon said runner by screws or bolts.

part of the saddle B is formed a recess, b',

curved upon the arc of a circle having a common center with the arc ofthe concave of the Y top of said saddle. The recess b is designed toreceivethe head of the bolt D, which bolt passes up through a short slotin the saddle B, and through a hole in the beam C, and has a nut screwedupon its upper end.

This construction allows the runner to adjust itself to uneven ground,while the beam is held in place by a reach passing from the forward beamto the hind one. The saddle B also strengthens the runner A, and rendersit less liable to split or break.

I am aware of the existence of a sled in which a rocking cap-plate iscombined with a runner-knee having an arc-shaped surface.

Having thus described myinvention, 1 claim as newand desire to secure byLetters Patent- The saddle B, combined with the runners A, the beam O,and the bolt D, substantially as shown and described.

HIRAM S. BARTLETT.

Witnesses:

GEO. P. BARTLETT, GEO. F. WHITE.

